As the title states I'm asking what's the average difference in horsepower and torque numbers between a Mustang dyno and a Dynojet? Just curious as I've always heard Mustang's are usually 10-15% lower than a Dynojet.

 

The problem is 99% of mustangs dyno's have had the calibration adjusted (easily done by user) so they read like a dynojet. So just because its a mustang dyno doesnt mean it will read lower.

 

Exactly correct. So if you go to a Mustang shop, ask that question.

I ran a Dyno Dynamics for the last five years. We never messed with the calibration. They provide a “Comparison” mode, so one button shows what a DJ would read. The math was easy, 14% lower. Customers didn’t like it. So more than a few went to a DJ and went “whew”.

Funny though, run the dragstrip numbers with the Wallace calculators, matches our results.

Dynojet became the std, I’ve not yet seen a DJ number match real world.

Ron

 

Everyone just use a dynapak. Then you'll have all the inflated numbers you want

 

Yes, if calibrated properly a MD will read about 15% less than a DJ. My only experience has been with MD.

Don set it up when it was installed and still use what he put in. We do periodically re-calibrate it using the weight bar and letting the drum free spin down on its own(with a car on it)
There are a few numbers to check to see how far out of calibration it is.

I will say this. After we got the MD, EVERYONE cried about how their cars didn't make what the internet said it should. We got tired of explaining, almost every time, why the numbers were lower than a DJ. We called MD and we created a math channel for lack of a better term, to "show" what a DJ would and suddenly everyone was happy.

A dyno is a tool, but people use it to measure their dicks. If you are searching for a number to make yourself feel better, go to a different dyno, you will eventually find one that will give you the number you want. It's just like looking for a girl who tells you that your **** is the biggest she's ever seen....

If there are 2 cars, everything being equal. One makes 500rwhp on a MD and the other makes 500rwhp on a DJ.

My money is on the MD car. Every damn time.

 

DynoJet makes a load bearing dyno too, so when asking the tuner what type of dyno he uses, make sure he specifies which type if he simply says it a DynoJet.

https://www.dynojet.com/2wd-automoti...-model-224xlc/

My last dyno tune was on a DynoJet 224xLC. IMO watching the tuner use it wasn't much different than watching the same car (different engine) while it was tuned previously on a regular DJ and then finally on a Mustang Dyno. IMO if done right, you will get a much more reliable tune on a Mustang or DynoJet 224xLC than a regular DJ especially if you have a power adder (Procharged, Turbo, etc)..

My last tune lasted almost 5 hours on the DJ 224XLC - at least one hour which was correcting all of the mistakes from the first five tunes over a period of 10 years as I made modifications to the car, the engine and drivetrain.

IMO how it drives and performs as a daily driver and/or on the drag strip is more important than whether it made 600 on a Mustang/Dynojet 224 VS 690 on a regular DJ.